I played Drana as my commander for years, but got bored recently and wanted to try something new. I've switched to Kuon, Ogre Ascendant and have been enjoying it. You have kind of a mini game of trying to flip him. Fleshbag marauder effects are the easiest way to do it. Then you get to watch him eat the board.
I think some of the most interesting generals come from the Kamigawa block. They are different and not overpowering. Horobi, Death's Wail and Shirei, Shizo's Caretaker are the two that really jump out to me. Shirei is fragile but can do some fun stuff.
Personally my favorite casual mono-black commander has been Kuon, Ogre Ascendant. He is good in devotion builds for nykthos, even better now that we have 4x fleshbag marauders, great at deflecting early aggro, and an excellent distraction from the command zone.
Anowon is only ok. The fact that he triggers on your upkeep rather than each opponent's is a real drawback. Most of the time he will not survive a full circuit. If you want that effect I would pay a few more mana and run Sheoldred instead. She draws just as much hate but creates way more value.
So I did end up making a Chainer deck in the end and so far I'm really enjoying it. I just wanted to thank everyone in the thread fornhelping me out, especially those who convinced me to give Chainer a try.